Abstract:
The invention is the extrusion of sulfur from thiodinitriles to obtain the corresponding dinitrile by heating the thiodinitrile at a temperature of 200* to 700*C. For example, sulfur is extruded from thiodipropionitrile to obtain adiponitrile. This extrusion reaction can be either a strictly thermal reaction employing no other reactant or a reaction conducted in the presence of other gases, liquids or solids.
Abstract:
STEAM IS USED KEEP THE QUIESCENT ZONE ABOUT 200*F. COOLER THAN THE TURBULENT ZONE OF A FLUID-BED REACTOR UTILIZED IN THE AMMOXIDATION OF MONOOLEFINS TO UNSATURATED NITRIELS. STEAM ESCAPING FROM THE QUIESCENT ZONE INTO THE TURBULEN ZONE PREVENTS FUSION OF POWDERY CATALYST IN THE PRESENCE OF OXYGEN AND THE ADHESION OF FUSED CATALYST TO INTERNALS IN THE TOP PORTION OF THE REACTOR.